Contemporary Controls BASstat BAST-221C-B2, User Manual, Page: 8 / 36

UM-15090000-AA8 Page 7
2 Specifications
2.1. Inputs
Item Description
Temperature Display Range 14 to 140°F (-10 to +60°C)
Temperature Display Resolution 0.1°F (0.1°C)
Temperature Accuracy ±1.8°F (±1.0°C) with all outputs off
Setpoint Range 32 to 122°F (0 to 50°C) in 0.5° (°F or °C) increments
Remote Temperature Sensor Provision for NTC Type 3kΩ thermistor
2.2. Outputs
Item Description
Relay Outputs Heating 1, Heating 2, Cooling 1, Cooling 2, Fan
Contact Rating SPST 2A at 30 VAC with inductive load
Minimum contact life 100,000 cycles
2.3. Communication
Item Description
Protocol Compliance BACnet MS/TP with B-ASC, BTL Listed
Physical Layer 2-wire, non-isolated EIA-485, no built-in EOL termination
Baud Rate 9.6, 19.2, 38.4, 76.8 kbps (default 38.4 kbps), N81 format
Cabling Single-pair twisted 24GA with shield
2.4. Electrical
Item Description
Supply Voltage and Current 24 VAC (±10%) 5 VA
Power Source Class NFPA 70 (NEC) Article 725 Part III Class 2
Internal Power Supply Half-wave rectified and filtered DC